Multiple Simultaneous Ranging in IR-UWB Networks

Shah, Shashi; Demeechai, Tanee

doi:10.3390/s19245415

Cited by 8 publications

(11 citation statements)

References 18 publications

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“…Denote the time difference of reception of the two packets at node V ∈ {M, A, B} by P V . Then, for any nodes X ∈ {M, A, B} and Y ∈ {M, A, B}, it can be shown that [19]…”

Section: Antenna Delay Measurement System a Proposed Methodsmentioning

confidence: 99%

Antenna Delay Calibration of UWB Nodes

Shah

Chaiwong²,

Kovavisaruch³

et al. 2021

IEEE Access

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“…Denote the time difference of reception of the two packets at node V ∈ {M, A, B} by P V . Then, for any nodes X ∈ {M, A, B} and Y ∈ {M, A, B}, it can be shown that [19]…”

Section: Antenna Delay Measurement System a Proposed Methodsmentioning

confidence: 99%

Antenna Delay Calibration of UWB Nodes

Shah

Chaiwong²,

Kovavisaruch³

et al. 2021

IEEE Access

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“…In this section, we provide the comprehensive mathematical modeling, design, and implementation of the proposed system. Based on the principle of multiple simultaneous ranging (MSR) [ 34 ] and the property of time difference of reception of two packets transmitted from different sources, we formulate the proposed system to simultaneously measure the position and antenna delay values of anchor nodes in a UWB-based RTLS.…”

Section: Node Calibration Systemmentioning

confidence: 99%

“…Let

denote the time difference of reception of the two sensing packets at node i . Then, for any receptor nodes i and j , it can be shown that [ 34 ]

where

is the TOF from node i to node j . Now, suppose that

is to be computed as if it was measured by a preferred clock, and the clock of

is selected as the preferred clock.…”

Section: Node Calibration Systemmentioning

confidence: 99%

“…The master node operates to request initiation of a sensing session, collect components of the sensing information from the other UWB nodes, i.e., the antenna-delay-uncalibrated time difference of receptions of respective nodes, and log the data to the PC via a serial UART. At each of the K known positions, the mobile node performs TWR sessions based on MSR [ 34 ], where the mobile node is the selected node of the preferred clock and the transmitter of the first and third packets during a sensing session, with all the anchor nodes. Hence, each sensing session yields one sensing information based on ( 11 ) and

number of sensing information based on ( 12 ).…”

Section: Node Calibration Systemmentioning

confidence: 99%

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Node Calibration in UWB-Based RTLSs Using Multiple Simultaneous Ranging

Shah

Kovavisaruch

Kaemarungsi

et al. 2022

Sensors

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Ultra-wideband (UWB) networks are gaining wide acceptance in short- to medium-range wireless sensing and positioning applications in indoor environments due to their capability of providing high-ranging accuracy. However, the performance is highly related to the accuracy of measured position and antenna delay of anchor nodes, which form a reference positioning system of fixed infrastructure nodes. Usually, the position and antenna delay of the anchor nodes are measured separately as a standard initial procedure. Such separate measurement procedures require relatively more time and manual interventions. This paper presents a system that simultaneously measures the position and antenna delay of the anchor nodes. It provides comprehensive mathematical modeling, design, and implementation of the proposed system. An experimental evaluation in a line-of-sight (LOS) environment shows the effectiveness of the anchor nodes, whose position and antenna delay values are measured by the proposed system, in localizing a mobile node.

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“…The range between base station and the tag can be measured by the TOA algorithm. The method usually relies on the exchange of signal messages between the two nodes [18]. In order to degrade the effect of the conventional two way ranging (TWR) [19].…”

Section: Ranging Algorithmmentioning

confidence: 99%

Semi-Autonomous Coordinate Configuration Technology of Base Stations in Indoor Positioning System Based on UWB

Yang

Wang

et al. 2019

Electronics

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In the global positioning system (GPS) denied environment, an indoor positioning system based on ultra-wide band (UWB) technology has been utilized for target location and navigation. It can provide a more accurate positioning measurement than those based on received signal strength (RSS). Although promising, it suffers from some shortcomings that base stations should be preinstalled to obtain reference coordinate information, just as navigation satellites in the GPS system. In order to improve the positioning accuracy, a large number of base stations should be preinstalled and assigned coordinates in the large-scale network. However, the coordinate setup process of the base stations is cumbersome, time consuming, and laborious. For a class of linear network topology, a semi-autonomous coordinate configuration technology of base stations is designed, which refers to three conceptions of segmentation, virtual triangle, and bidirectional calculation. It consists of two stages in every segment: Forward and backward. In the forward stage, it utilizes the manual coordinate setup method to deal with the foremost two base stations, and then the remaining base stations autonomously calculate their coordinates by building the virtual triangle train. In the backward stage, the reverse operation is performed, but the foremost two base stations of the next segment should be used as the head. In the last segment, the last two base stations should be used as the head. Integrating forward and backward data, the base stations could improve their location accuracy. It is shown that our algorithm is feasible and practical in simulation results and can dramatically reduce the system configuration time. In addition, the error and maximum base station number for one segment caused by our algorithm are discussed theoretically.

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Multiple Simultaneous Ranging in IR-UWB Networks

Cited by 8 publications

References 18 publications

Antenna Delay Calibration of UWB Nodes

Antenna Delay Calibration of UWB Nodes

Node Calibration in UWB-Based RTLSs Using Multiple Simultaneous Ranging

Semi-Autonomous Coordinate Configuration Technology of Base Stations in Indoor Positioning System Based on UWB

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